Machine-sickle grinder.



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Patented Aug. 8, |899. E..V. GREEN.

MACHINE SICKLE GRINDER.

(Applicatibnled Apr. 80, 1898. Renewed Mar. 24, 1899..)

2 Sheets-Sheet 2.

(No Model.)

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UNITED STATES PATENT EEIGE.

EDDIE vILAs GREEN, or TOI'DEKA,A KANSAS, ASSIGNoR, BY DIREcT AND MES-NE ASSIGNMENTS, on rIjwo-TIILIRDS To ALBERT cALvIN MARITLEY, oE SAME PLACE, AND, GEORGE WESLEY MARKLEY, or CARBONDALE,

KANSAS.4

MACHINE-SICKLE GRINDER.

SPECIFICATION forming part of Letters tPatent No. 630,687, dated August 8, 1899.

Application filed .Btpril 30, 1898. Renewed March 2d, 1899. Serial No. 710,39 l. (No model.)

To all iuhom/ t may concern,.-

Beit known that I, EDDIEQVILAS GREEN, a resident of Topeka, inthe county of Shawnee' and State of Kansas, have invented certain newr and useful Improvements in Mowing- Machine-Sickle Grinders, of which'the following is a full, clear, and exactspeciiication.

My invention has for its primary object the production of an improved mechanism for automatically grinding the sickles ofk mowing-machines and reapers, and, second arily, the application of such mechanism inv connection with a mowing-machine or reaper, so that the sickles may be ground while operating in the field, whereby the power of the mower or reaper may be utilized for grinding its own sickles, thus saving the employment of manual labor for that purpose and alsosecuring the convenience of always having a sharpened Sickle with the machine ready for use when needed, and, lastly, to secure a uniform edge or face on all the different Sections or cutters of the sickle.

In the accompanying drawings, Figure 1 is a plan View of my improved grinding mechanism applied to a mowing-machine Vin connection with a sickle upon which it is operating. Fig. 2 is a vertical transverse section on .the line 2 2, Fig. 1. Fig. 3 is a Vertical section showing sickle-bar raised. Fig. tis a detail view illustrating the operation of the grinding mechanism.

The frame 1 of the mowing-machine mayk be constructed in the usual manner and supported by Wheels 2, applied to an axle 3, to which said frame is suitably secured. One of said wheels 2 has an internally-toothed annular gear attached to its inner side, as shown in Figs. 1 and 2. Such gear 4 serves as the primary motor for the grinding mechanism proper, and for this purpose a gear 5 meshes with the annular gear 4, the same being mounted on a Shaft 6, that is held in bearings in the frame 1 and provided at its inner endY with a beveled gear 7, which in turn meshes with a similar 0fear 7a mounted upon 4a Shaft"8, which is arranged at right angles to the driving-Shaft 6. On this driven Shaft 8 is arranged a sprocket-wheel 9, from 5o which a chain 10 runs to a corresponding l sprocket-Wheel`9?, mounted vupon the Shaft 1lj,"that,carries thegrindin g disk or wheel 12.

vvrThe said shaft l1 isrigidly connected with.

`tl1e,dis kv142, and -has Aits bearings in two bifurcated supports 13 and 133; The support 13L is p ivoted to the frame at lat, (see Fig. 2,) j and the other Support 13 is eccentrically connected with the sprocket-wheel 9 by means of a wrist-pin 1 5. It is apparent that by this arrangement and connection ot' parts the grind- 4ing-disk '12 has two movements-namely, ar'otary movement, due to the coaction ot the sprocket-wheels 9 and 9a and chain l0, an d a vertical oscillating movement, due to the eccentric connection of the support 13 with the sprocket-wheel 9. The object of the rotary movement is, obviously, to cause the disk 12 to act on the sickle-sections in such manner as to grind them at the point of contact, and the edge of the disk has a double bevel or obtuse angle to adapt it to act on two contiguous sickle-sections at the same time. The object of the oscillating movementof the disk 12 is to cause the latter t0 act on the entire length of the cuttingedges of the contiguous sickle-sections, Since it is lcarried inward, as it were, from the points ofy the sections to their inner angle, the said edges' being thus traversed by the grinding- Surface of the disk at each oscillation of the latter. 'The' result isthat the edges are ground perfectly uniform throughout and method of grinding manually or by hand.

v lI will now describe the means for 'holding the sickle-'bar and the'means for raising it from the disk and shifting it longitudinally to enable the disk to act on the different Sickle-sections.

The sickle-bar is secured in clamps 16, which are hinged to plates 16', secured to a bar 17, which is adapted to slide on the elevated portion 1a of the frame 1. bar is clamped in place by screws 18, and the clamps 16 are connected by abar 19, so that they may be raised and lowered together.

more perfectly than is possible by the usual The sickle- The aforesaid bar 17 is connected with the frame portion 1a by means of a dovetail slide, (shown in Fig.` 2,) and is thus adapted for endwise movement, while held firmly in place IOO as regards lateral movement. The means for raising the sickle-bar when required. consist of a foot-lever 20, arranged, as shown in Fig. 3, at a rearward inclination from the verti- Cal, and a horizontal lever 21, which is pivotally connected with said lever 20 and also with a push-bar 22, which is arranged vertically in a suitable guide on frame 1. The said lever 2l is pivoted in a hanger 23, attached to the under side of the frame l. The vertical lever 2O is arranged in a keeper 2 (see Fig. 3,) attached to the side of the frame 1. The said keeper serves to hold the lever 2O in due working position, but allows a certain freedom of movement of the same in a plane parallel to the frame 1*. The upper end of the lever 2O is provided with a suitable foot-support 20, and a pawl 25 is pivoted to said lever and arranged in such position that its free end engages the ratchetface 26, formed on the upper side of the slidable bar 17. As shown in Fig. 3, the teeth of the ratchet 26 are inclined toward the front, so that their shoulders are at the rear, and thus adapted for engagement with the pawl 25 when the' upper end of the lever 2O is swung forward. It will now be understood that when the driver of the mowing-machine or reaper presses downward with his foot upon the support 20"L the lever 2O will be depressed, as shown by full lines, Fig. 3, and the horizontal lever 21 thereby tilted, so as to raise the bar 22, whose bent upper end works in contact with the bar 19, connecting the clamps 15 of the sickle-bar. The upward movement of said bar 22 will obviously raise the sickle-bar, as shown by dotted lines, Fig. 2, and thereby lift it clear of the disk 12, in which position it is adapted to be moved forward or longitudinally a sufficient distance to bring another set of sickle-sections into working contact with the disk 12. This movenient is eiected by the driver pushing the upper end of the lever 2O forward to the limit allowed by the keeper 24, as will appear by inspection of Fig. 3. In such movement the pivotal connection of the lever 2O with the lever 21 is obviously its fulcrnm. So soon as this slidable movement of the sickle-carrying bar 17 has been made and the driver releases the pressure on the lever 20 the sickle will drop by its own gravity into contact with the disk 12, when the grinding will proceed as before.

It will thus be seen that my improved mechanism is adapted for automatically grinding sickle-sections evenly and perfectly the entire length of their cutting edges, and that the sickle-bar may be shifted a uniform distance as required to enable the grinder to act on the successive pairs of sickle-sections by the simple m ovement of the lever 20, which movement includes, first, depression of said lever and, secondly, its forward movement or oscillation, as before described.

That I claim is- 1. The combination,with motormechanism, of sickle-grinding mechanism, comprising a grinding-disk, and means for rotating and oscillatin g the same in a vertical plane, substantially as shown and described.

2. The combination, with a motor mechanism of a grinding-disk,a pivotal support there-- for, means for oscillating said pivotal support and imparting rotation to the disk, simultaneously, a slidable carrier for the sickle-bar, and lever mechanism for imparting an intermittent sliding movement to such carrier, substantially as shown and described.

3. The combination,with a driven shaft and sprocket-wheel mounted thereon, of a hanger which is eccentrically connected with such wheel, a second hanger or support which is pivoted to a iixed support a grinding-disk whose shaft has its bearings in the connected ends of such supports, a sprocket-wheel mounted on said shaft, a chain connecting the sprocket-wheels, and a pivoted oscillating holder or clamp for the sickle-bar, substantially as shown and described.

et. The combination, with the transportingwheel of a mowing or reaping machine, having a gear aiiixed thereto, of supplemental gearing driven by such gear, agrinding-disk having its bearings in oscillating supports, as specified, one of which supports has an eccentric connection with the supplemental gearing, means for rotating the said disks, and a sickle-bar clamp or holder which is adapted to oscillate corresponding to the vertical movement of the disk, substantially as shown and described.

5. The combination,with the frame havinga guideway arranged longitudinally thereon, a carrier slidable in such guideway, and the sickle-bar clamp hinged on the carrier, of the foot-lever pivoted to swing in a vertical plane, the pawl on said lever engaging the slide, the pivoted foot-lever adapted to oscillate vertically, and a push-bar pivoted to lever 21 and arranged vertically in the guideway for bearing against the clamp, and raising it and the sickle, as and for the purpose specified.

EDDIE VILAS GREEN.

Vitnesses:

WM. HALL JENKINS, GEO. M. CRAWFORD.

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